本文實例講述了Android編程實現為ListView創建上下文菜單(ContextMenu)的方法。分享給大家供大家參考，具體如下：
ContextMenu稱為上下文菜單，一般在控件上長按時彈出。今天我們學習ContextMenu的用法，這里與listview相結合，先在ListView顯示幾個Item,然后在Item上長按，彈出一個菜單（就是ContextMenu）,點擊菜單上的項目，提示剛才長按的Item的Position。
main.xml文件
<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical"> <TextView android:id="@+id/text" android:text="zzz" android:textSize="18sp" android:textColor="#FFFFFF" android:layout_width="fill_parent" android:layout_height="wrap_content"/> <ListView android:id="@+id/list" android:layout_width="fill_parent" android:layout_height="fill_parent"> </ListView></LinearLayout>
菜單有3個條目，在/res/menu/test_menu.xml中定義，和OptionMenu差不多，只是沒有Icon
package com.hello.menu;import android.app.Activity;import android.os.Bundle;import android.view.ContextMenu;import android.view.Menu;import android.view.MenuInflater;import android.view.MenuItem;import android.view.View;import android.view.ContextMenu.ContextMenuInfo;import android.widget.AdapterView.AdapterContextMenuInfo;import android.widget.ArrayAdapter;import android.widget.ListView;import android.widget.SimpleAdapter;import android.widget.TextView;public class ApiDemos extends Activity { /** Called when the activity is first created. */ private TextView mTextView; private ListView mListView; private String [] values; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); mTextView = (TextView) findViewById(R.id.text); //下面的代碼用于初始化一些數據 values = new String[30]; StringBuilder sb = new StringBuilder("z"); for (int i = 0; i < values.length; i++) { sb.append(i); values[i] = sb.toString(); } mListView = (ListView) findViewById(R.id.list); mListView.setAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, values)); mTextView.setText(String.valueOf(mListView.getAdapter().getCount())); //為ListView注冊ContextMenu registerForContextMenu(mListView); } //創建ContextMenu @Override public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) { // TODO Auto-generated method stub if (v.getId() == R.id.list) { MenuInflater inflater = getMenuInflater(); menu.setHeaderTitle("contextView sample").setHeaderIcon(R.drawable.icon); inflater.inflate(R.menu.test_menu, menu); } super.onCreateContextMenu(menu, v, menuInfo); } @Override public boolean onContextItemSelected(MenuItem item) { // TODO Auto-generated method stub if (item.getMenuInfo() instanceof AdapterContextMenuInfo) { AdapterContextMenuInfo menuInfo = (AdapterContextMenuInfo) item.getMenuInfo(); //處理菜單的點擊事件 switch (item.getItemId()) { case R.id.call: mTextView.setText(item.getTitle().toString() + menuInfo.position); break; case R.id.cc: mTextView.setText(item.getTitle().toString() + menuInfo.position); break; case R.id.poweroff : mTextView.setText(item.getTitle().toString() + menuInfo.position); break; } } return super.onContextItemSelected(item); }}希望本文所述對大家Android程序設計有所幫助。
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